CN113106586A - Production method of pure cotton flexible yarn - Google Patents
Production method of pure cotton flexible yarn Download PDFInfo
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- CN113106586A CN113106586A CN202110410114.3A CN202110410114A CN113106586A CN 113106586 A CN113106586 A CN 113106586A CN 202110410114 A CN202110410114 A CN 202110410114A CN 113106586 A CN113106586 A CN 113106586A
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/72—Fibre-condensing guides
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/02—Spinning or twisting arrangements for imparting permanent twist
- D01H7/90—Arrangements with two or more spinning or twisting devices of different types in combination
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/01—Natural vegetable fibres
- D10B2201/02—Cotton
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention relates to a production method of pure cotton flexible yarn, belonging to the technical field of textile. The production method of the pure cotton flexible yarn combines three spinning modes of compact spinning, siro spinning and low-torque spinning, takes negative pressure and twist as variables and takes the yarn diameter as a calculation reference, and establishes a yarn diameter prediction model based on negative pressure and twist change. The invention combines the advantages of three spinning forms, and can adopt smaller yarn twist to carry out normal production; a flexible yarn mathematical model is established, so that the yarn diameter can be predicted, the product design and development period is shortened, the test development cost is reduced, and more profits are created for enterprises.
Description
Technical Field
The invention relates to a production method of pure cotton flexible yarn, belonging to the technical field of textile.
Background
The yarn diameter and twist have direct influence on the softness, comfort and internal quality performance of the fabric, and the smaller the yarn twist, the larger the yarn diameter, the thicker and firmer the fabric, the softer the fabric and the better the hand feeling under the condition of the same tissue specification. However, the lower twist means that the yarn strength is reduced, and the number of yarn breakage in the spinning, weaving, and other processes is increased, which results in low production efficiency and increased cost. Therefore, the number twist factor of the conventional yarn is usually more than 290 so as to ensure the balance of production and product quality.
The yarn diameter is an important index for reflecting the thickness of the yarn, and further influences the thickness, the hand feeling and other properties of the fabric. On a common ring spinning frame, the twist of the yarn under the condition of the same count is a main factor influencing the diameter of the yarn, but with the development of modern spinning technology, novel spinning forms such as compact spinning, siro spinning, low-torque spinning, vortex spinning and the like continuously appear on the market at present, the spinning principles are different, and therefore the factor influencing the diameter of the yarn is only the twist, such as the negative pressure of the compact spinning and the vortex size of the vortex spinning also influence the diameter of the yarn.
The compact spinning is that a group of components are additionally arranged at the front roller, drafted fiber strands are tightly gathered together by using an air suction negative pressure or mechanical method, a twisting triangular space is basically eliminated, the control force of the front roller and the twist on fibers is greatly enhanced, the yarn strength is improved by 10-20% compared with that of the common ring spinning, the hairiness number of the yarn over 3mm is reduced by over 60%, and the yarn quality is greatly improved.
The sirospun yarn is characterized in that two pieces of rough yarn are fed into the same drafting mechanism of a ring spinning frame in parallel at a certain interval, are simultaneously drafted in a parallel state, form two fiber bundles with a certain interval after coming out from a clamping point of a front roller, naturally converge the two fiber bundles due to the twisting action of the ring below the front roller, and then are wound on a yarn tube through a yarn guide hook and a steel wire ring to form the sirospun yarn, and the sirospun yarn has the characteristics of orderly arranged surface fibers, less filoplume, high strength and smooth appearance.
The low-torque spinning is characterized in that a false twisting device is arranged between a front roller and a yarn guide hook of a ring spinning frame, dynamic twist distribution of three areas, namely a roller jaw and the false twisting device, the false twisting device and the yarn guide hook, the yarn guide hook and a steel wire ring, in the spinning process is changed, the shape and arrangement of fibers in single yarn are changed, residual torques generated by the fibers in the yarn are balanced, and the effects of low twist, low twist and high strength of the single yarn are achieved.
The spinning forms are already on the market at present, each spinning form has characteristics and has a large influence on the yarn performance, but a yarn diameter calculation method combining the three spinning forms is not available in the market at present, indexes such as the yarn diameter and the like can be known only by actual spinning detection, the product development cycle is prolonged, if the comparison test data is more, the process parameters such as the twist degree wheel needs to be replaced and the negative pressure needs to be adjusted when the vehicle is changed every time, time and labor are wasted, the production cost is increased, the delivery period is delayed easily, and the customer claims.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a production method of pure cotton flexible yarns, which establishes a yarn diameter, twist and negative pressure model formula by combining three spinning modes of compact spinning, siro spinning and low-torque spinning, improves the predictability of the yarn diameter and twist on the fabric performance, reduces the test period and reduces the test development cost.
The production method of the pure cotton flexible yarn provided by the invention combines three spinning modes of compact spinning, siro spinning and low-torque spinning, takes negative pressure and twist as variables and yarn diameter as calculation reference, establishes a yarn diameter prediction model based on negative pressure and twist change, and mainly comprises the following steps:
1) taking the produced pure cotton 14.6tex yarn as a test object, and establishing a mathematical model 1 of the yarn diameter y and the negative pressure x according to test data, wherein the correlation coefficient of the model is 0.9992 as shown in figure 1;
2) taking 14.6tex yarn as a test object, and establishing a yarn diameter y and twist x mathematical model 2 according to test data, wherein the correlation coefficient of the model is 1 as shown in figure 2;
3) combining mathematical model 1 and mathematical model 2, respectively giving model weights a and b, establishing mathematical model 3, fitting 8 groups of test data (see table 1 specifically) by using origin software, wherein the model converges, the weight a is 0.18073, the correlation coefficient is 0.99691, the weight b is 0.82889, and the correlation coefficient is 0.99691;
the 14.6tex yarn diameter mathematical model 3 was established as:
y＝((247.34*P^(-0.062))*0.18073+(0.1301*T^2-8.1916*T+301.9)*0.82889)/1000
in the formula: y is the yarn diameter in mm; p is negative pressure and unit Hz; t is twist, unit twist/in;
TABLE 1 test data and mathematical model calculations
4) The yarn diameter has a direct relation with the yarn number according to the conversion formula of textile materials:
y＝0.037SQRT(X)，
in the formula: y is the yarn diameter in mm; x is the number of the yarn and the unit tex;
obtaining the SQRT (X/14.6) of the yarn diameter ratio of different numbers and 14.6 tex;
substituting the relation between the yarn diameter and the yarn number into the mathematical model, and establishing a general mathematical model of the yarn diameter, the yarn number, the twist and the negative pressure:
y＝SQRT(X*(1+C)/14.6)*((247.34*P^(-0.062))*0.18073+(0.1301*T^2-8.1916*T+301.9)*0.82889)/1000，
in the formula: y is the yarn diameter in mm; p is negative pressure and unit Hz; t is twist, unit twist/in; x is the number of the yarn and the unit tex; c is the weight deviation of the yarn number X in%.
Wherein:
the pure cotton yarn is produced by adopting three spinning modes of compact spinning, siro spinning and low-torque spinning, and the yarn count range is 10 Ne-80 Ne.
The air suction negative pressure range of the special-shaped pipe of the compact spinning frame is 15-50 Hz.
The yarn English twist range is 5T/in-30T/in.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention combines the advantages of three spinning forms and can adopt smaller yarn twist to carry out normal production.
2. The invention establishes the flexible yarn mathematical model, so that the yarn diameter can be predicted, the product design and development period is shortened, the test development cost is reduced, and more profits are created for enterprises.
Drawings
FIG. 1 is a mathematical model 1 of the present invention: a yarn diameter y (mum) and a negative pressure P (Hz) mathematical model;
FIG. 2 is a mathematical model 2 of the present invention: mathematical model of yarn diameter y (mum) and twist T (T/in)
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1
The production method of the pure cotton flexible yarn combines three spinning modes of compact spinning, siro spinning and low-torque spinning, takes negative pressure and twist as variables and yarn diameter as calculation reference, establishes a yarn diameter prediction model based on negative pressure and twist change, and mainly comprises the following steps:
1) taking the produced pure cotton 14.6tex yarn as a test object, and establishing a mathematical model 1 of the yarn diameter y and the negative pressure x according to test data, wherein the correlation coefficient of the model is 0.9992 as shown in figure 1;
2) taking 14.6tex yarn as a test object, and establishing a yarn diameter y and twist x mathematical model 2 according to test data, wherein the correlation coefficient of the model is 1 as shown in figure 2;
3) combining mathematical model 1 and mathematical model 2, respectively giving model weights a and b, establishing mathematical model 3, fitting 8 groups of test data (see table 1 specifically) by using origin software, wherein the model converges, the weight a is 0.18073, the correlation coefficient is 0.99691, the weight b is 0.82889, and the correlation coefficient is 0.99691;
the 14.6tex yarn diameter mathematical model 3 was established as:
y＝((247.34*P^(-0.062))*0.18073+(0.1301*T^2-8.1916*T+301.9)*0.82889)/1000
in the formula: y is the yarn diameter in mm; p is negative pressure and unit Hz; t is twist, unit twist/in;
TABLE 1 test data and mathematical model calculations
4) The yarn diameter has a direct relation with the yarn number according to the conversion formula of textile materials:
y＝0.037SQRT(X)，
in the formula: y is the yarn diameter in mm; x is the number of the yarn and the unit tex;
obtaining the SQRT (X/14.6) of the yarn diameter ratio of different numbers and 14.6 tex;
substituting the relation between the yarn diameter and the yarn number into the mathematical model, and establishing a general mathematical model of the yarn diameter, the yarn number, the twist and the negative pressure:
y＝SQRT(X*(1+C)/14.6)*((247.34*P^(-0.062))*0.18073+(0.1301*T^2-8.1916*T+301.9)*0.82889)/1000，
in the formula: y is the yarn diameter in mm; p is negative pressure and unit Hz; t is twist, unit twist/in; x is the number of the yarn and the unit tex; c is the weight deviation of the yarn number X in%.
The method is characterized in that 100% American fine cotton is adopted, two kinds of pure cotton yarns of 14.6tex and 18.2tex are produced on a spinning machine in combination with three spinning modes of compact siro low torque, the yarn twist and the spinning machine negative pressure are changed for testing, and the yarn weight deviation and the yarn diameter are tested. The yarn diameter is calculated through a mathematical model, and compared with an actual measurement result, the error of the mathematical model is verified to be within +/-3.0%, and the method has high referential property. The experimental and mathematical model results are shown in table 2.
TABLE 2 results of the tests and the general model calculations
Claims (4)
1. A production method of pure cotton flexible yarn is characterized in that: the method is characterized in that a yarn diameter prediction model based on negative pressure and twist change is established by combining three spinning modes of compact spinning, siro spinning and low-torque spinning, taking negative pressure and twist as variables and taking the yarn diameter as calculation reference, and the method mainly comprises the following steps:
1) taking the produced pure cotton 14.6tex yarn as a test object, and establishing a mathematical model 1 of the yarn diameter y and the negative pressure x according to test data, wherein the correlation coefficient of the model is 0.9992;
2) taking 14.6tex yarn as a test object, establishing a yarn diameter y and twist x mathematical model 2 according to test data, wherein the correlation coefficient of the model is 1;
3) combining mathematical model 1 and mathematical model 2, respectively giving model weights a and b, establishing mathematical model 3, fitting 8 groups of test data by using origin software, wherein the model converges, the weight a is 0.18073, the correlation coefficient is 0.99691, the weight b is 0.82889, and the correlation coefficient is 0.99691;
the 14.6tex yarn diameter mathematical model 3 was established as:
y＝((247.34*P^(-0.062))*0.18073+(0.1301*T^2-8.1916*T+301.9)*0.82889)/1000
in the formula: y is the yarn diameter in mm; p is negative pressure and unit Hz; t is twist, unit twist/in;
4) the yarn diameter has a direct relation with the yarn number according to the conversion formula of textile materials:
y＝0.037SQRT(X)，
in the formula: y is the yarn diameter in mm; x is the number of the yarn and the unit tex;
obtaining the SQRT (X/14.6) of the yarn diameter ratio of different numbers and 14.6 tex;
substituting the relation between the yarn diameter and the yarn number into the mathematical model, and establishing a general mathematical model of the yarn diameter, the yarn number, the twist and the negative pressure:
y＝SQRT(X*(1+C)/14.6)*((247.34*P^(-0.062))*0.18073+(0.1301*T^2-8.1916*T+301.9)*0.82889)/1000，
in the formula: y is the yarn diameter in mm; p is negative pressure and unit Hz; t is twist, unit twist/in; x is the number of the yarn and the unit tex; c is the weight deviation of the yarn number X in%.
2. The method for producing a pure cotton flexible yarn according to claim 1, characterized in that: the pure cotton yarn is produced by adopting three spinning modes of compact spinning, siro spinning and low-torque spinning, and the yarn count range is 10 Ne-80 Ne.
3. The method for producing a pure cotton flexible yarn according to claim 1, characterized in that: the air suction negative pressure range of the special-shaped pipe of the compact spinning frame is 15-50 Hz.
4. The method for producing a pure cotton flexible yarn according to claim 1, characterized in that: the yarn English twist range is 5T/in-30T/in.
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2021
- 2021-04-16 CN CN202110410114.3A patent/CN113106586B/en active Active
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